Gas-range burner



April 3,-1928. 1,664,509

P. s. HARPER GAS RANGE BURNER File-d May-2o. 1927 Patented Apr.y 3, 19.28.

2mn s. wenn, or CHICAGO, ILLINOIS.

eas-men BURNER. i

Applies/aon ma :my so, 1927. serial no. 19am.

This invention relates to gas burners of the type generally used on gas ranges, hot

plates and other cooking and heating appliances, and applies solely to a double burner mixer face having a plurality of mixing ,tubes and a similar number of burner sections.-

This invention consists of a double gas burner with a single gas cock together with a combination of mixer face and air shutter parts so arranged and constructed as to 1ntercept the area of air supply to each section of the double burnerl as properly required by such section.

The object vo this invention is to provide a simple means of adjusting for a double t e burner.

Another object of this invention is to arrange a burner of this `double type so that itv may be so constructed as to have only a single mpvable part for adjustment of the Anot-hei7 object of this` invention is the provision of a burner of this type which will fit into the space available on the standard gas range.

Another object of this invention is the rovision of any air shutter in which a tight joint on the mixer face is insured between said sections and around th/e opening to the smaller of said sections.

Another object is a shutter for a double burner which mayv be adjusted without removing the burner from the stove.

These and other objects of this invention Will be apparent from the following description and drawings, inwhichthe air supply Figure 1 is a artial sectional elevation. ofl

a burner, air s utter and gas cock of the type of this invention shown in the regularly assembled position and taken along line 1-1 of Figure 2;

Figure`2 is a plan view of the entire assembly; l a

Figure 3 is a bottom View of the stop washer at the lower end of the plug;

Figure 4 is a front elevational View of the Figure 5 is a front view of the inner Shutter which lies against the inner side of the mixer face in Figure 1;

Figure 6 is a view of the mixer cap which covers the inner shutter in Figure 1; and Figure 7 is a front elevational view of the mixer face, the inner shutter and outer cap assembledthereQn in an operating position.

Referring now to the drawings, in Figure 1 a manifold pipe 10 is shown into which is screwed one end of the gas cock body 11, l

s aid end having a passage 12 therein which continues into the tapered plug 13, said plug having a ground bearing 14 in the said: body 11 asin the usual gas cock. The said passage 12 is enlarged at point 15 in said plug and .then passes out of the plug into the threaded nozzle end 16 where it is a ain enlarged at 17 for accommodation of t e noz-v threaded nozzle end 16 there isscrewed a nozzlecap 21 having in its outer end a centrally placed orifice 22. This jet 18 in combmation with the nozzle cap 21, forms an adjustable nozzle, and the cap 21 is screwed more or less on the threads-of the nozzle end 16 causing the jet 18 to enter the ori- -iice 22 if conditions require, so as to throttle this orifice.

Returning now to the passage 12, before entering the plug, a smaller passage 23 leads ott therefrom into a passage 26 in the casing 11, which passage 26 asses through the plug 13, and is substantially parallel to the former passage 12 of the said plug. Said passage 26 is larger than both the small part and lthe enlarged part of -passage 12 for purposes hereinafter to be set forth.

In. the said plug 13 there is a diagonal i -equalizing passage 32 connecting the passage 26 with the passage 12. From the outer end of passage 26 there leads a connecting. passage 33 to an enlarged horizontal passage 34 in the threaded upper nozzle end 35. The outer end of passage 26 is closed by a stopper plugl 36 substantially as shown. The said nozzle end 35 is fitted with a jet 37 and vcap 38, similar to the lower jet 18 and lower cap 2l, except that the orifice 39 in the cap38 is very much smaller than the former orifice 22 in the cap end of the plug 13l has an extension 40 which extends through a washer 41, a coil spring 42 and a stop washer 43. Said stop washer is held'in place by the'stop pin44 which passes transversely through the lower end 40 of the plug 13, and said washer has stops 45 limiting the turning of the plug to substantially degrees. The under surface 46 of said stop washer 43 forms a .cam which bears on stop pin 44 and has one or more radial V notches therein engaging said pin in in- 2l. The lower face 46 inbearing vagainst said stop pin 44. The stop washer 43 is guided on tie lower end of the casing 11 as shown and has internal ribs (not shown) extending into slots in said casing preventing rotary movement, but. said washer is free to slide in said slots .in a longitudinal direction.

The head 48 of said plug 13 has` a stove bolt 49 threaded therein and serves to fasten on the porcelain handle 50, all in accordance with standard gas range cock practice.

The nozzle caps 21 and 38 project through an outer shutter 51 and an inner shutter 52, said shutters being fastened to the mixer face 53 by the clamping Screw 54. Nozzle cap 21 projects into a mixing tube 55 and said mixing tube has side passages 56 leading therefrom into the outer burner section 57 which is of the usual star shape or any other shape desired and has burner ports 58 in the top surface thereof after the manner of the usual construction of gas range burners. The upper nozzle 38 projects into upper mixing tube 59 which in turn leads directly to the boil-ing burner section 60 which has burner ports 61 in the top thereof. These ports 61 are spaced in a circle or otherwise conveniently arranged toprovide a small boiling burner or so called simmer burner.

Referring to Figure 4, mixer tubes 55 and 59 are shown separated by division wall 62, which has an enlarged portion 63 with a tapped hole 64 therein. The openings to lsaid mixing tubes 55 and 59 are arranged within a circular wall 65 concentric with the lower mixing tube 55. Figure 5 shows the inner shutter piece 52 which has apertures 66 and 67 to accommodate the caps 2.1 and 38 shown in Figure 1. It also .has an opening 68 registering with the enlarged portion 63 of Figure 4. In addition there are air openings 69 and 70 of width a so arranged as to open into the lower mixing tube 55, and there is a slotted opening 71 of width b so arranged as to open into upper mixing tube 59. y

Figure 6 shows the aforesaid outer mixing cap 51 which has a central hole 72 for the accommodation of lower nozzle cap 21; circularly extending slotted opening 73 of proper width so that upper nozzle 38 may project therethrough and has a small extension 74 of the latter slot 73. In the lower part of said cap are openings 75 and 76. Said latter openings are positioned so that they register with openings 69 and 70 in the mixer shutter, and slot 7 3 is so placed as to register with slot 71 in said inner shutter.

Referring to Figure 7, inner shutter 52 and outer shutter 51 are shown fastened ,to

position or hub 63 which is placed as shown on the division wall 62 between mixing tubes 55 and59. In Figure 7 the outer shutter is shown partially rotated in a counterclock'- wise direction so as to partiall uncover slot 71 in the inner shutter 52 leading to the upper mixing tube 59 and also partially uncover openings 69 and 70 leading to the lower mixing tube 55. The screw 54 and upper nozzle 38 do not interfere with such rotation since they follow in thecircular slotted openings 73 and 74 respectively in said outer shutter. The area of the opening `79 to the simmer section is very small to properly control the air supply to such very small section while openings 80 and 81, two of them together, are large to suit the large section, and in designnga shutter of this type the air opening to the small section is proportioned to the combined openings to the larger section in proportion to the gas properly burned by each. And in this shutter with slotted air openings as shown, if the outer shutter is adjusted for a very small opening first, and then we rotate the outer shutter in counterclockwise direction so asto double the air opening to the small section, it is obvious thatthe opening to the large section is likewise doubled; and there is al' ways the same proportion between the air opening tothe small section and to the large section no matter what thesetting of the outer shutter 51. This is substantially as required for proper adjustment of both sections since high gas pressure of a low heating value of gas requiring little air opening affects both sectionsl alike, and the air shutter opening to each section should properly be cut down in area so that the area of air shutter opening is at all times in the same proportion to the gas volume in one section as in the other. Air shutters of the ty e of this invention are unlikely to be perfectly tight between the face of mixer and the shutters, and while the consequent leakage is not harmful to the large section, it may be on the other hand very harmful to the small section where the primary air is small in amount and the leakage -air is of conse` quently larger proportion thereto. For this reason I have devised this shutter with the clamping screw 54 placed in the wall 62 between the two mixing tubes and consequently it is as close as ossible to the opening 82 to the smaller section and clamps the shutters tightly around the edge of this opening. Likewise, I have incorporated a fin 83 at the far side of the opening to decrease the size of this opening, and to keep all parts of the opening as near the clamping screw'54 as possible. Also in view of the fact that air leakage to the small section is detrimental, I have devised the shutter so that the opening 67 exactly fits the nozzle 38 whereas the openings 66 and 72 are larger. than the nozzle 21, and consequently any variation in the spacing o'f the nozzles on the cock is taken up on the larger section where the leakage, due to the additional opening required for this lower nozzle, does not interfere so seriously with the operation of the burner.

While I have described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the roportion of partssand the substitution of equivalents as circumstances suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

l. A double gas range burner with a gas cock having a single lever handle and ,having two gas nozzles, said nozzles projecting through an air shutter common to two mixing tubes into which said nozzles respect-ive ly discharge, one to each tube, each of said tubes leading to a burner section having a plurality of burner ports in the upper side thereof, one section having over twice the number of ports as the other section, said air shutter having an adjustable closing means intercepting air openings to both of said Amixing tubes, the air opening to one tube being over twice the air opening to t-he other tube.vv l

2. A double gas range burner with a gas cock having a single plug member Fintercepting passages leading to two as nozzles, said nozzles projecting through oles in an air shutter common to the two mixing tubes into lwhich said nozzles respectivel discharge, one to each tube, each of sai tubes leading toa burner `section having a plurality of burner ports in the upper side thereof, one section having over twice the number of ports as the other "section, said shutter havingfan adjustable closing means common to .the air'o enings'to the said two mixing tubes, the air opening to one tube being over twice the air opening to the other tube in a plurality of positions of said adjustable closing means. f

`3. A double gas range burner with a gas j cock having a single plug member interce ting passages leading to two gas nozz es, said nozzles projecting through holes in an air shutter common to the two mixin tubes into which said. nozzles respective y dis- L charge, one to. each tube, each of said tubes `leading to abu'rnei; sectionl having a plusection, said shutter havin rality of burner .ports in the upper side thereof, one section having over twice the number of ports as the other section, said shutter having an adjustable closing means common to the air openings to the said two mixing tubes, the air opening to one tube in a plurality of positions of said adjustable closing means being proportioned to the air opening to the other tube in substantially the same proportion as the ratio between the number of burner ports in one section and the number of burner ports in the other seiction.

4. A double as range burner with a gas cock having a single plug member intercepting passages leading totwo gas nozzles, said nozzles projecting through holes in an air shutter common'to the two mixing tubes `into which said nozzles respectively discharge, one to each tube, a'wall separating .said mixing tubes, a clamping screw threaded into an enlargement contiguous to said wall, each of said tubes leading to a burner section having a plurality of burner ports in the upper side thereof, one section having over twice the number of ports as the other an adjustable closing means common to t e air lopenings to the said two mixing tubes, the air opening to one tube being over twice the air opening to the other tube in a plurality of positions of said adjustable closing means.

5. A double gas'range burner with a gasv cock having a single plug member intercepting passages leading to two gas nozzles, said nozzles projecting through holes in an air shutter common to the two mixing tubes into which said nozzles respectively discharge, one toeaoh tube, each of said tubes leading to a burner section having a plurality 'of burner ports in the upper side thereof, one section having over twice the numbery of orts as the other section, said shutter having an adjustable closing means common to the air openings to the said two mixing tubes, the air opening to one tube being over twice the air opening to the other tube in a plurality of positions of said adjustable closing means, said shutter being circular in shape with one of the said nozzle holes substantiallyin the center thereof and the ,other nozzle hole considerably oii center, the nozzle hole in said shutter forthe nozzle dis-l charging to the small burner section fitting iis i ignea at chicago, niinoisihis i'aihda'y of May, 1927.

PHILIP S. HARPER. 

